fix(email): retire legacy SMTP follow-up

Keep follow-up draft generation but remove the direct application SMTP delivery boundary. Route users to the provider-aware Job email flow and return 410 for legacy API callers.

job-tracker-ui/src/components/JobDetailsDialog.tsx

@@ -178,7 +178,6 @@ export default function JobDetailsDialog({ open, jobId, onClose, initialTab = 0,
 
   const [followUpDraft, setFollowUpDraft] = useState<FollowUpDraft | null>(null);
   const [loadingDraft, setLoadingDraft] = useState(false);
-  const [sendingDraft, setSendingDraft] = useState(false);
   const [refreshingAi, setRefreshingAi] = useState(false);
   const [candidateFit, setCandidateFit] = useState<CandidateFit | null>(null);
   const [matchScore, setMatchScore] = useState<MatchScore | null>(null);
@@ -1265,29 +1264,15 @@ export default function JobDetailsDialog({ open, jobId, onClose, initialTab = 0,
                 <Box sx={{ p: 1.5, borderRadius: 3, border: "1px solid", borderColor: "warning.main", backgroundColor: "background.default" }}>
                   <Typography variant="overline">Manual send boundary</Typography>
                   <Typography variant="body2" sx={{ color: "text.secondary" }}>
-                    Generating or regenerating this grounded draft never sends recruiter email. The only outbound step is the explicit “Send and log email” action below.
+                    Generating or regenerating this grounded draft never sends recruiter email. Copy it or open Job email, where the connected provider and final confirmation are shown before delivery.
                   </Typography>
                 </Box>
-                <TextField label={t("jobDetailsRecipient")} value={draftRecipient} onChange={(e) => setDraftRecipient(e.target.value)} helperText={`${t("jobDetailsRecipientHelp")} Manual send only — nothing is dispatched until you press send.`} />
+                <TextField label={t("jobDetailsRecipient")} value={draftRecipient} onChange={(e) => setDraftRecipient(e.target.value)} helperText={`${t("jobDetailsRecipientHelp")} This draft is not sent from the Follow up tab.`} />
                 <TextField label={t("jobDetailsSubject")} value={draftSubject} onChange={(e) => setDraftSubject(e.target.value)} />
-                <TextField label={t("jobDetailsDraft")} multiline minRows={8} value={draftBody} onChange={(e) => setDraftBody(e.target.value)} helperText="You can edit this before sending. Sending stays manual and logs the sent note back to correspondence." />
+                <TextField label={t("jobDetailsDraft")} multiline minRows={8} value={draftBody} onChange={(e) => setDraftBody(e.target.value)} helperText="You can edit and copy this draft. Provider delivery is available only from Job email." />
                 <Box sx={{ display: "flex", justifyContent: "space-between", gap: 1, flexWrap: "wrap" }}>
                   <Button variant="outlined" onClick={() => navigator.clipboard.writeText(`${draftSubject}\n\n${draftBody}`)}>{t("jobDetailsCopyDraft")}</Button>
-                  <Button variant="contained" disabled={sendingDraft || !draftSubject.trim() || !draftBody.trim()} onClick={async () => {
-                    if (!jobId) return;
-                    setSendingDraft(true);
-                    try {
-                      await api.post(`/jobapplications/${jobId}/send-followup`, { toEmail: draftRecipient || null, subject: draftSubject, body: draftBody, nextFollowUpAt: followUpDraft.suggestedSendOn || null });
-                      setJob((prev) => prev ? { ...prev, followUpAt: followUpDraft.suggestedSendOn } : prev);
-                      readinessCache.clearCached();
-                      setReadiness(null);
-                      toast(t("jobDetailsFollowUpSent"), "success");
-                    } catch (error: any) {
-                      toast(getApiErrorMessage(error, t("jobDetailsFollowUpSendFailed")), "error");
-                    } finally {
-                      setSendingDraft(false);
-                    }
-                  }}>{sendingDraft ? t("jobDetailsSending") : t("jobDetailsSendAndLogEmail")}</Button>
+                  <Button variant="contained" href="/correspondence">{t("jobDetailsOpenJobEmail")}</Button>
                 </Box>
               </Box>
             ) : <Typography sx={{ color: "text.secondary" }}>{t("jobDetailsNoDraftAvailable")}</Typography>}